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C_FLUID CONTROL CATALOGUE
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2018
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APPENDIX
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08
TEMPERATURE
MULTIPLES AND SUB-MULTIPLES
°F = [1,8 · °C] + 32
°C = [°F - 32] · 0,55
°K = °C + 273
°C = degrees Celsius
°K = degrees Kelvin
°F = degrees Fahrenheit
Name
Symbol
Value
tera
T
10
12
giga
G
10
9
mega
M
10
6
kilo
k
10
3
etto
h
10
2
deca
da
10
deci
d
10
–1
centi
c
10
–2
milli
m
10
–3
micro
µ
10
–6
nano
n
10
–9
pico
p
10
–12
ENTHALPY DIFFERENCE, SPECIFIC HEAT
Δh
kJ/kg
kcal/kg
Btu/pound
1 kJ/kg
1
0,239
0,43
1 kcal/kg
4,19
1
1,80
1 Btu/lb
2,33
0,556
1
1 cal/g = kcal/kg
ENTROPY DIFFERENCE, SPECIFIC HEAT
Δs
kJ/kg K
kcal/kg °C
Btu/pound °F
1 kJ/kg K
1
0,239
0,239
1 kcal/kg °C
4,19
1
1
1 Btu/lb °F
4,19
1
1
PRESSURE
1 bar = 10
5
N/m
2
1 at = 1 Kp/cm
2
poundal
poundal
1 atm = 760 Torr
Hg column
H
2
O column (WC)
sq ft
sq in
= 760mm Hg
(0°C)
(4°C)
= Psi
(0°C)
mm Hg = Torr in Hg
m H
2
O ft H
2
O
1 Pa = 1 N/m
2
1.10
-5
1,02.10
-5
0,0209 1,45.10
-4
9,87.10
-6
0,0075
2,95.10
-4
1,02.10
-4
3,35.10
-4
1 bar
1
1,0197
2089
14,504
0,9869
750
29,5
10,20
33,5
1 at
0,980665
1
2048
14,22
0,96784
735,56
29,0
10,00
32,8
1 pdl/sq ft
0,4790.10
-3
0,4882.10
-3
1
6,944.10
-3
0,4725.10
-3
0,359
0,141
4,88.10
-3
0,0160
1 pdl/sq in = Psi
0,06895
0,07031
144
1
0,06806
51,7
2,04
0,703
2,31
1 atm
1,013
1,033
2120
14,70
1
760
29,09
10,33
33,9
1mm Hg
1,330.10
-3
1,360.10
-3
2,78
0,0193
1,316.10
-3
1
0,0394 0,0136
0,0446
1 in Hg
0,0339
0,0345
70,7
0,4910
0,0334
25,4
1
0,3450
1,133
1 mH
2
O
0,0981
0,1000
205
1,4220
0,0968
73,6
2,90
1
3,28
1 ft H
2
O
0,0299
0,0305
62,4
0,4340
0,0295
22,4
0,883
0,3050
1
1 N/m
2
= Pa (Pascal) = 10 dyn/cm
2
; 1 kp/m
2
= 10
-4
kp/cm
2
= 1mm WC (at 4°C)
WORK, ENERGY, HEAT CONTENT
1 kcal
1 kp m
Btu
ft
1 kWh
Horsepower/hour (hph)
on-day
1 Joule = 1 Nm
= Ws
(British
poundal
metrical
imperial
of refrigeration
thermal unit)
75 kp m/s h
550 lb.ft/s h
1 kcal
1
427,0
3,968
3088
1,163.10
-3
1,581.10
-3
1,560.10
-3
13,779.10
-6
4190
1 kpm
2,342.10
-3
1
9,294.10
-3
7,233
2,723.10
-6
3,704.10
-6
3,653.10
-6
32,270.10
-6
9,807
1 Btu
0,252
107,59
1
778,0
0,293.10
-3
0,398.10
-3
0,3931.10
-3
3,472.10
-6
1055
1 ft pdl
0,3238.10
3
0,13826
1,285.10
-3
1
0,377.10
-6
0,512.10
-6
0,505.10
-6
4,462.10
-9
1,356
1 kWh
860
367,1.10
-3
3412,8
2,655.10
6
1
1,360
1,341
11,850.10
-3
2,6.10
6
1 PSh
632,3
270.10
-3
2509
1,953.10
6
0,7353
1
0,9863
8,713.10
-3
2,65.10
6
1 hph
641,1
273,7.10
-3
2545
1,980.10
6
0,7457
1,014
1
8,834.10
-3
2,68.10
6
1 ton-day
72,57.10
-3
30,99.10
-3
288.10
3
244,1.10
6
84,39
144,78
113,2
1
304.10
6
1 J
0,239.10
-3
0,102
0,948.10
-3
0,738
0,278.10
-6
0,378.10
-6
0,372.10
-6
3,280.10
-9
1
1 erg = 1 dyn cm = 10
-7
Nm ; 1 kJ = 10
3
J
CAPACITY, ENERGY FLOW, HEAT FLOW
1 kcal/h 1 kp m/s
British
1 kcal/s = British 1 kWh = 1 kJ/s Horsepower hour
US Standard
British
thermal unit
theor. unit
(HP)
commercial ton commercial ton
per hour
of refrigeration
metrical 75 kp m/s imperial 550 lb.ft/s
of refrigeration
of refrigeration
1 kcal/h
1
0,1186
3,968
0,278.10
-3
1,163.10
-3
1,581.10
-3
1,560.10
-3
0,331.10
-3
0,299.10
-3
1 kp m/s
8,4312 1
33,455
2,342.10
-3
9,804.10
-3
13,333.10
-3
13,150.10
-3
2,792.10
-3
2,520.10
-3
1 Btu/h
0,252 29,89.10
-3
1
0,07.10
-3
0,293.10
-3
0,398.10
-3
0,393.10
-3
0,083.10
-3
75,310.10
-3
1 kcal/s
3600
427,0
14,285.10
-3
1
4,186
5,693
5,615
1,190
1,078
1 kW
860,0
102,0
3414
0,2389
1
1,360
1,341
0,2846
0,2572
1 HP
632,3
75
2509,3
0,1756
0,736
1
0,9863
0,2094
0,1891
1 hp
641,2
76,04
2545
0,1781
0,7455
1,014
1
0,2123
0,21227
1 ton
3024
358,2
12,0.10
3
0,831
3,513
4,776
4,711
1
0,9037
1 Br ton
3340
396,9
13,26.10
3
0,9277
3,888
5,287
5,214
1,1045
1
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